Bolt-heading machine



(ModeL) 6 Sheets- Sheet 2.

J.- 0. DU G'KWORTH. BOLT READING MACHINE.

No 2523140. Patented Jail. 17,1882.

(ModeL) J. c. DUGKWORTH. BOL-T HEADING-MAGHINE.

No. 252,440. Patented Jan. 17, 18:82,.

1 411155555, T IJ E 6 Sheets-Sheet 3.

' (.Mndieh) 6 Sheet-Qheet 4;

" J 01. DUOKWORTH.

BOLT READING MACHINE.- .No. 252,440. Patented Jan; 17,1882.

(ModeL) 6 Sheets-Sheet 5.

J. O. DUOKWORTH.

BOLT HEADING MACHINE.

No. 252,440. Patented Jan.17,'1882 (ModeL) I I 6Sheets-She'et a. J. 0. DUGK'WORTH. BOLT HEADING MACHINE.

No. 252,440. Patented Jan. 17,1882.

ft 1 "M v 1 T155555, v l| W- I'M-W- I,

UN TED STATES PATENT ()FFICE- JOHN G. DUGKWORTELQF WORCESTER, MASSACHUSETTS.

,BOLT-HEADING MACHINE.

SPECIFICATION forming part of Letters Patent No. 252,440, dated January 17, 1882.

Application filed March 14,1881. (ModeL) To all whom it may concern Be it known that I, JOHN G. DUGKWORTH, of the city and county of Worcester, and Commonwe'alth of Massachusetts, have invented certain new and useful Improvementsin Bolt- HeadingMachines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being bad to the accompany ing drawings, forming a part of this specification, and in which- Figure 1 represents a top or plan view of a bolt-heading machine with my improvements applied thereto, as will be hereinafter more fully described. Fig. 2 represents a side view of the machine shown in Fig. 1,1oohing in'the direction indicated by arrow 1, same figure.

Fig.3 represents an end view of the machine,

looking in the direction indicated by arrow 2,

. Fig. 1. Fig. 4 represents a vertical longitudinal section through the machine, taken on line w m, Fig; 1, looking in the direction indicated by arrow 1, same figure. Fig. 5 repre sents a vertical transverse section through a part of the machine, taken on line 00* as, Fig. 1, looking in the direction indicated by arrow 2, same figure. Fig.6 also represents, upon an enlarged scale,.a' vertical transverse section through another part, of the machine, taken at the point'sho'wn by lines m :0 Fig. 4, looking in the direction indicated by arrow 3 of 1],12,and 13 represent, upon the same en-,

larged scale as Figs. 6, 7, and 8, modifications of partsof the machine, whichwill be hereinafter more fully described. The last one, Fig.

' ]3,represents avertical central section through the parts shown in Fig. 12, taken on line 00 m and looking in the direction indicated by arrow 6 of said figure.

To enable those skilled in the art to which my invention belongs to make and use the same, I will proceed to describe it more in detail.

The nature of my invention consists in. the combination and arrangementofdies and heading-punches (one punch for each die) and plunger mechanism, the said dies being stationary and the heading-punches secured in a moving or reciprocating head; also, in the novel arset forth; also, in thedischarging mechanism for discharging the finished blank bolts from the tongs or clamps; also, in the arrangement of levers and connections with plunger-levers, so that each plunger can be regulated or adjusted separatelywhen all are operated from one cam.

In thedrawings, A represents the main frame resting on the legs B B.

O is the die-head; D, the slide-head upon which the punches are arranged; E E, slideways; F, the pitman connecting the slide D with the crank G on main shaft G; H, the driving-wheel, revolving in the direction indicated by arrows; and h h, the bearing-boxes of main shaft G.

On main shaft G is secured the bevel-gear wheel which meshes into bevelgear wheel 1 and thus communicates motion to the spurgear wheels a c a through the medium of shaft I. (See Figs. 8 and 6.)

S is a support for spur-gear wheels to a? a which is bolted to head 0. c c c c are the stationary dies, arranged in the arc of acircle from the center of stud J in the die-head 0. (See Fig. 6.)

cl 0? d d are the heading-punches, secured in the slide-head D in the arc of a circle to correspond to the dies c 0 .0 0, each punch opposite its respective die.

It will be readily understood by those versed in the art that the form or shape of the dies and headingpunches maybe varied according to the shape of the bolt-head required to be made. In illustrating-the advantages of this arrangement I have only shown four dies and blanks will not catch as they are movedfrom four heading-punches, which may be so made as to form a bolt with an oval, round, or button head, as desired, and also a square shank under the head, if preferred.

By the first die, and heading-punch d the blank will be partially upset. The second die, 0 and heading-punch 11 will upset the blank still more, and thus compress and upset the k vibrating shaft k which latter has bearings at each end in main frame A.

On the shaft k are secured arms k one of whichisshown in Fig. 4. The others, being back of the plunger-levers, are not shown, and to the upper ends of said arms are hinged or pivoted connecting-rods k is k k, which in turn are secured to plunger-levers 70 70 70",

and the said plunger-levers are arranged to bear against the plunger-slides e e 6 6 ,111 which the plungers e e e e are secured. Plunger-slides move back and forth on their rods e Spiral spring L, which is secured at one end to bracket 1 on main frame A, and attached to the lowerend of arm k forces stud-roll k to follow the surface of cam K through connectin g-rod k and lever and also forces the plunger-levers 70 k It It back against the ends of regulating-screws 6 0 0 e in plate M through-arms k (one of which is shown in Fig. 4) and connecting-rods 70 It 7c 70 and also forces back the plunger-s e e e" e by means of a projection, 0 on each side of the plunger levers 70 70 k k", which projections work in recesses of plunger-slides e c 0 0 as fully indicated in Figs. 1 and 4. The screws 6 e e e are for the purpose ofresisting the blow of the heading-punches when striking or act ing upon the bolt-blanks, and they are also employed to gage the various lengths of bolts to be made.

The plunger-levers 70 76 k 70" have slots is, in which the studs ot' connecting-rods It 70 It 7c are secured. By changing the position of said studs. in their respective slots the throw of each of said plunger-levers maybe varied to regulate the throw of plungers c c c a. By this arrangement of separate plnn' ger-levers and connections each plunger may be regulated to stop the blank at different positions in the dies, whereby the heading operation may be varied in the different dies-that is, one heading-die may be made to upset or.

one die to the other.

To regulate the plungers for-different lengths of bolts, the regulating-screws 0 0 6 e are set for such length as is required, and varying throw or movement of the plungers is obtained by moving the studs of connecting-rod k in either or both the lever 70 or arm 74.

' In Fig.6 an enlarged view of die-head G is represented, and J is a stud secured to or projeeting therefrom. N is a plate or sprocketwheelrevolving on'stud J, and having slots n and concave circles a corresponding to the circle of disk-plate n. Said disk-plate n is secured to spur-gear wheel a A portion of the periphery of said disk-plate is cut away, and a pin, n is secured in spurgear wheel a so that at each revolution of said gear-wheel a the pin a takes into one of the slots 11, formed in plate-wheel N, and turns it one-eighth of a revolution, and then securely locks it by means of disk-plate n, fitting into one of the concave circles a" of said sprocket-wheel'N.

To plate or sprocket whee'lN is secured the wheel 0, and consequently has the same intermittent revolving motion as wheel N. In the wheel 0 are arranged and secured'the tongs or clamps 0 0 0 0 as indicated in the drawings. In these clamps the properly-heated blanks for making the bolts are inserted above the axis of its motion, and said blanks thereafter are carried around opposite the center of each die 0 c c e in the operation of the machine. These clamps have a cup or conical mouth to enable a blank to be readily inserted, and also to enable them to be easily opened by the punches d d d d as they are moved forward to push the blanks into the dies 0 c 0 0, and said punches keep the said clamps open until the said punches recede, and the boltblanks are forced out by theplungers e e e e immediately as the said punches recede from the said dies.

' The cam K on shaft G must be of the proper IIO shape and set in time to force the bolt-blanks out of the dies and follow closely the punches as it recedes, so that the blanks will enter the tongs or clampsbefore the punches have left them, and said clamps are broughttogether by the springs 0, and clamp theirrespective boltblanks as thesaid punches leavethesaidclamps. When the heading-punches have receded sufficiently wheel 0 and it's clamps move the boltblanks from die to die, the motion of wheel 0 being obtained, as indicated above, by means of the action of pin n on sprocket-wheel N. The machine being in continuous motion, the blanks can be inserted in the said clamps at any time between the discharge and the first die 0.

In Figs. 7 and 8, 0 0 o 0 represent the tongs or clamps, which are pivoted on the bolts 8 s s s, and open each way from the central steady pins, 8 s s s. I

' 0 are springs of sufficient strength to force the clamps 0 0 0 0 together and hold the bolt-blank firmly. The clamps o 0 0 are prevented from binding on the stop or steady pins in consequence of said pins being small enough to allow the said clamps to bind on the bolt-blanks before clamping said pins. To hold the clamps steady and in proper position for the dies 0 e c 0 the said pins 8 are formed withbevel-heads,and are forced in against said clamps by flat springs t H t, as indicated in Fig. 8.

A stop-plate, R, is arranged and secured on die-head O, which prevents the bolt-blanks beingpushed in too far in the clamps 0 0 o 0 when first inserted.

The partmarked P represents the discharger for discharging the blanks bolts from the clamps after they have passed the finishing-die c and the rear end of said discharger P is secured to an upwardly-projecting stand-piece, p, from theslide e, and consequently each. time the slide .6 is moved forward discharger P will be forced entirely through one of the clamps and the bolt-blank forced out and delivered from the machine.

The forming-dies, at leasttwo of them, may be made under some circumstances in amodi' fied form, substantially as shown in the drawings, Figs. 9 and 13, inclusive.

Figs. 12 and 13 represent one half of the dies 0 and a movable-that is, so made that one half can move away from the other or stationary part of the die.

The parts marked 1: are movable, and the parts marked v are stationary, being secured and rigidly fastened to the die-head G.

The movableparts o of the dies 0 and c are arranged to slide back and forth on pins ww in such a manner that the movable part is always retained in itsproper relative position, as respects the other parts of the machine, during the opening and closing of the dies.

On the fulcrumed stud 3 a lever, V, is arranged with a friction-roll, V, upon its upper end. Saidfriction-roll rests upon the face of cam U, fast on the shaft I, and is consequently elevated and allowed to fall at each revolution of the cam U.

In Fig.9 short toggle-pieces with rounded ends are fitted in corresponding rounded depressions or recesses in the hub of lever V and in the movable parts 1: 'u ofthe dies, while iii-Fig. 11 projections to w are formed on the lever V to bear against the movable parts 1: t of the dies 0. and 0 to close and hold the dies together once in each revolution of shaft I and cam U, as and for the purpose hereinafter explained.

From the foregoing description it will be seen that when cam U acts with its greatest throw upon the upper end of leverV in both cases the movable parts of the dies will be forced up toward and closed against the stationary parts of the dies, and that when the cam U ceases toact upon lever V the movable parts of the dies will be loosened and allowed to spread apart.

The object of using the divided dies is to obviate any wedging of the shank part of the bolt-blanks in the dies, when long bolts are made so as to retard or interfere with the proper discharge of the bolt-blanks fromthe dies, by their respective plungers.

Having described my improvements in boltheading machines, what I claim therein as new and of my invention, and desire to secureby Letters Patent, is-

1. In abolt-heading machine, the combination of stationary dies, heading-punches, reg ulatingscrews, and automatically moving clamps or tongs, when combined and operating substantially as described.

2. One or more bolt-blank tongs or clamps, 0, provided with a spring, 0 and steadyingpin .9, substantially as and for the purposes described.

3. The combination of the tongs or clamps with the sprocketwheel N, disk-plate a, pin

a, and toothed wheel (i substantially as and for the purpose described.

4. The combination, with a bolt-heading punch, of the cup or conical shaped mouthed JOHN G. DUGKWORTH.

I Witnesses: j

THOS. H. Donen, EDWIN E. MOORE. 

